/*
 *
 *  * | Licensed 未经许可不能去掉「OPENIITA」相关版权
 *  * +----------------------------------------------------------------------
 *  * | Author: xw2sy@163.com
 *  * +----------------------------------------------------------------------
 *
 *  Copyright [2024] [OPENIITA]
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 * /
 */

package cc.iotkit.common.web.config;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.annotation.JacksonStdImpl;
import com.fasterxml.jackson.databind.ser.std.NumberSerializer;

import java.io.IOException;

/**
 * 超出 JS 最大最小值 处理
 *
 * @author Lion Li
 */
@JacksonStdImpl
public class BigNumberSerializer extends NumberSerializer {

    /**
     * 根据 JS Number.MAX_SAFE_INTEGER 与 Number.MIN_SAFE_INTEGER 得来
     */
    private static final long MAX_SAFE_INTEGER = 9007199254740991L;
    private static final long MIN_SAFE_INTEGER = -9007199254740991L;

    /**
     * 提供实例
     */
    public static final BigNumberSerializer INSTANCE = new BigNumberSerializer(Number.class);

    public BigNumberSerializer(Class<? extends Number> rawType) {
        super(rawType);
    }

    @Override
    public void serialize(Number value, JsonGenerator gen, SerializerProvider provider) throws IOException {
        // 超出范围 序列化位字符串
        if (value.longValue() > MIN_SAFE_INTEGER && value.longValue() < MAX_SAFE_INTEGER) {
            super.serialize(value, gen, provider);
        } else {
            gen.writeString(value.toString());
        }
    }
}
